“Biljana Čubrović, Acoustic Investigations of Serbian and American English Vowel Inventories, Belgrade: Faculty of Philology, 2016, str. 155”., PH, vol. 15, no. 1, pp. 83–101, Mar. 2021, Accessed: Dec. 05, 2025. [Online]. Available: https://philologia.org.rs/index.php/ph/article/view/67